CN110423620A - A kind of enhanced remediation composite treating agent of soil nitrobenzene contamination - Google Patents
A kind of enhanced remediation composite treating agent of soil nitrobenzene contamination Download PDFInfo
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- CN110423620A CN110423620A CN201910499725.2A CN201910499725A CN110423620A CN 110423620 A CN110423620 A CN 110423620A CN 201910499725 A CN201910499725 A CN 201910499725A CN 110423620 A CN110423620 A CN 110423620A
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- ethyl alcohol
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/08—Reclamation of contaminated soil chemically
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- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K17/00—Soil-conditioning materials or soil-stabilising materials
- C09K17/40—Soil-conditioning materials or soil-stabilising materials containing mixtures of inorganic and organic compounds
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Abstract
The present invention relates to a kind of compound inorganic agents for enhancing restoration of soil nitrobenzene contamination, this method is to be placed into self-control in 95% ethyl alcohol and butyl glycol ether mixed solution by the soil of nitrobenzene contamination to be pre-processed (soil is totally submerged in mixed solution) first, after standing 30min, filtering, contaminated soil is to be used, furthermore the active carbon charcoal for making 0.8-1.0g/L by oneself is starched, quaternary ammonium salts cationic surface active agent, polyacrylamide, ethyl alcohol, butyl glycol ether and deionized water stir, above-mentioned compound inorganic agent is finally carried out absorption synergy elution to self-control nitrobenzene contamination soil to repair.Operation of the present invention is convenient, economical and practical, more Environmental Safety, has preferable enhanced remediation effect particularly with the soil of nitrobenzene contamination.
Description
Technical field
The invention belongs to soil enhanced remediation technical field more particularly to a kind of increasings of p-nitrophenyl soil pollution type
Imitate repair process technical field.
Background technique
With the continuous development of national economy, the development of chemical industry, environmental problem is also got worse, especially soil
And water pollution etc. is the most closely bound up to daily life, people's lives, diet etc. are made in soil pollution
At more serious influence.And in soil pollution based on more hydrophobic organic compound, due to such organic compound
The characteristics of object itself, determines that such compound is easy absorption without being readily removable in soil pollution, controls to the pollution of soil
Reason brings very serious difficulty.In numerous hydrophobic organic compounds mainly with nitrobenzene to the pollution of soil more
Seriously.
Nitrobenzene is a kind of important chemical intermediate, is to prepare the essential important substance of the chemical substances such as aniline
One of, nitrobenzene is not soluble in water, is soluble in ethyl alcohol, ether etc., has special odor, has biggish harm after human body sucking, can cause
Cancer, teratogenesis, mutagenesis are flammable and explosive substance, once will will cause very big influence into environment, which enters soil
It is also not degradable after earth.
To solve the above-mentioned problems, influence of the nitrobenzene to soil pollution is reduced, people are also made that one in the research
The breakthrough for determining degree administers soil pollution using surfactant enhanced remediation technology, but administers at such upper past
Toward single surfactant enhanced remediation technology is used, although the enhanced remediation technology of single surfactant is to a certain degree
On also reduce influence of the nitrobenzene to soil pollution, but effect is limited, in consideration of it, people use Compositional type surface again
Activator solution, mainly using Anionic-nonionic surfactant and cation-nonionic surfactant solution this two
Kind method, both compound surfactant solution are not much different in the effect for the treatment of of Nitrobenzene soil pollution, treatment effect
More single surfactant enhanced remediation processing technique has improved very much, but in the degree of p-nitrophenyl soil treatment
On the space that still has a distinct increment.
In this regard, with reference to the basic physical property of nitrobenzene, being chosen based on sun-nonionic built surfactant
The diffluent substance such as ethyl alcohol, ether is mixed solution, considers that the porous structure of active carbon has stronger suction-operated.It will
Above-mentioned all methods carry out reorganizing research, propose a kind of compound inorganic agent for enhancing restoration of soil nitrobenzene contamination.
Summary of the invention
At present while economic development and environment protection, on the one hand, nitrobenzene is as important industrial chemicals and change
Intermediate is learned, there is also the effects that can not be substituted in chemical production processes, but on the other hand, soil caused by nitrobenzene
Earth pollution, water pollution and atmosphere pollution etc. increasingly affect people's lives environment again, threaten people's health, right
Nitrobenzene contamination in soil is administered, we have done a large amount of experimental study, and the invention proposes one kind to be used for enhanced remediation
The compound inorganic agent of soil nitrobenzene contamination.
To achieve the goals above, the enhanced remediation composite treating agent of soil nitrobenzene contamination of the invention includes 95%
Ethyl alcohol and butyl glycol ether mixed solution, the active carbon charcoal slurry of 0.8-1.0g/L, quaternary ammonium salts cationic surface active agent,
Polyacrylamide, ethyl alcohol, butyl glycol ether, deionized water.
The application method of the enhanced remediation composite treating agent of the soil nitrobenzene contamination includes the following steps:
1) soil is randomly choosed, plant undesirable root, stone etc., natural air drying are removed, the sieving of 80 mesh is kept in dark place；
2) the active carbon charcoal slurry for preparing 0.8-1.0g/L, prepares nitrobenzene contamination pedotheque；
3) the nitrobenzene contamination pedotheque of preparation is placed into 95% ethyl alcohol and the mixed solution of butyl glycol ether
It is pre-processed (soil is totally submerged in mixed solution), after standing 30min, it is to be used to be contaminated soil for filtering；
4) by active carbon charcoal slurry, the quaternary ammonium salts cationic surface active agent, polyacrylamide, second of 0.8-1.0g/L
Alcohol, butyl glycol ether and deionized water stir, and prepare composite treating agent；
5) finally composite treating agent elutes self-control nitrobenzene contamination soil, the soil repaired.
Soil is removed into undesirable root in the present invention, the purpose that stone carries out 80 mesh sievings mainly is to be further reduced soil
Sundries in earth, so that soil is more preferably clean, on the one hand in order to weed out residue, on the other hand mainly the sieving of 80 mesh is mainly
It is in order to enable soil size is uniform, convenient for the processing operation in later period.
Self-control nitrobenzene contamination sample is carried out in advance using the mixed solution of 95% ethyl alcohol and butyl glycol ether in the present invention
Processing, why carrying out pretreatment to sample is because nitrobenzene is soluble in ethyl alcohol and butyl glycol ether.Using ethyl alcohol
Solution and butyl glycol ether p-nitrophenyl are pre-processed, and are being filtered, primarily in composite treating agent enhanced remediation
Before as far as possible can remove the nitrobenzene being mostly present in soil, used using two kinds of solvent complexes, can be improved makes
Effect dissolves more nitrobenzenes.Why compounded using 95% ethanol solution with butyl glycol ether, is on the one hand
On the other hand the considerations of for economic cost is that a small amount of water is added and matches because ethanol solution volatilizees comparatively fast in air
It closes butyl glycol ether to use, the volatilization of ethyl alcohol can be effectively reduced, extend the service life of pretreatment fluid and improve pre- place
Manage the using effect of liquid.
Preferably, the preferred cetyl trimethyl chlorine (bromine) of above-mentioned quaternary ammonium salts cationic surface active agent change ammonium,
Trimethyl chlorine (bromine) changes ammonium, tetradecyltrimethylammonium chlorine (bromine) changes ammonium, octadecyl trimethyl chlorine (bromine) is changed in ammonium
One or any of several combination.
The starting point of above-mentioned preferred all kinds of quaternary ammonium salts cationic surface active agents consider enhanced remediation effect,
The various aspects comprehensive consideration such as economic cost, smell, risk as a result, other quaternary ammonium salts cationic surface active agent ratio
Other kinds of cationic surfactant in system have better stabilization, either acid system still
It is relatively stable in alkaline system, therefore applicability is wider than general amine salt surfactant application field.
On the one hand ethyl alcohol and butyl glycol ether mixed solution in the compound inorganic agent primarily serve solubilising, inhale
The effect of attached nitrobenzene, another party are the surfactants in order to dissolve the insoluble type of part water.With poly- in the composite treating agent
Acrylamide, the substance belong to nonionic surface active agent, for can be effectively by nitrobenzene and other in the system
Pollution particulate matter is adsorbed and removed, and is particularly suitable for unseasoned aqueous nitrobenzene soil enhanced remediation processing.
The active carbon charcoal slurry concentration is 0.8-1.0g/L, and on the one hand the purpose using active carbon is can be effectively
The nitrobenzene in soil is absorbed, other pollution organic compounds in soil on the other hand also can be absorbed and removes soil
Peculiar smell etc. in earth, the starting point for why choosing the concentration are to be that the adsorption efficiency of active carbon is very high, and a small amount of active carbon is just
Good suction-operated can be played, on the one hand excessive active carbon causes waste, improves economic cost, be also unfavorable for
Disperse in system, in addition very few active carbon, and good suction-operated cannot be played, causes largely to be contaminated object residual, inhale
It is attached ineffective.
95% ethyl alcohol and butyl glycol ether mixed solution, active carbon charcoal slurry, the quaternary ammonium salts of making 0.8-1.0g/L by oneself
Zhan always feeds intake mass ratio respectively for cationic surface active agent, polyacrylamide, ethyl alcohol, butyl glycol ether and deionized water
25%, 15%, 1.2%, 1.8%, 10%, 10%, remaining is deionized water, amount to 100%.
The utility model has the advantages that
The compound processing agent solution of the present invention and other inorganic agents are deposited on treatment of Nitrobenzene contaminated soil enhanced remediation
In the apparent advantage of the following aspects: (1) reducing single and concentration and dosage of complexed surfactant, improve
Solubilization efficiency；(2) secondary pollution of surfactant is reduced；(3) generation of anion and cation surfactant fluid is avoided
The possibility of reaction or sedimentation；(4) intermolecular hydrogen bonding acts on, and enhanced remediation effect is more significant, can large-scale use；(5) it fits
Wider with range, repairing effect is more compared with built surfactant treatment fluid；(6) low in cost, economic value is high, is easy to
Operation.
Specific embodiment
Following embodiment further illustrates the contents of the present invention, but should not be construed as limiting the invention.Without departing substantially from
In the case where spirit of that invention and essence, to modification made by the method for the present invention, step or condition and replaces, belong to this hair
Bright range.
Unless otherwise specified, the conventional means that technological means used in embodiment is well known to those skilled in the art.
One, preparation process
Pedotheque is weighed, artificially uniform contaminated soil sample, control soil pollution amount are with the methanol solution of nitrobenzene
Every gram of soil 10mg nitrobenzene is made contaminated soil sample to be used, is kept in dark place as the methanol solution to the greatest extent that volatilizees at dark wind.
It is pre-processed (soil is totally submerged in mixed solution) in 95% ethyl alcohol and the mixed solution of butyl glycol ether, it is quiet
It is filtering drying, to be used after setting 30min.
Quartz sand is completed in the bottom of the organic glass pillar of diameter about 3cm, contaminated samples 100g is weighed, is put into column,
Glass column is gently beaten, guarantees that soil dense distribution in Organic glass column, is then covered with one layer of quartz sand, uses various concentration
Compound processing agent solution elute from top to down, every 100ml collects one layer of efflux.Measure the content of nitrobenzene in solution.
Each Materials Example that each scheme uses is as follows::
Embodiment 1:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon charcoal slurry for making 0.8-1.0g/L by oneself
150g, hexadecyltrimethylammonium chloride 15g, polyacrylamide 15g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is to go
Ionized water amounts to 1000g.
Embodiment 2:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon charcoal slurry for making 0.8-1.0g/L by oneself
150g, dodecyl trimethyl ammonium bromide 12g, polyacrylamide 18g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is to go
Ionized water amounts to 1000g.
Embodiment 3:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon charcoal slurry for making 0.8-1.0g/L by oneself
150g, tetradecyl trimethyl ammonium chloride 18g, polyacrylamide 12g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is to go
Ionized water amounts to 1000g.
Embodiment 4:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon charcoal slurry for making 0.8-1.0g/L by oneself
150g, Cetyltrimethylammonium bromide 10g, polyacrylamide 20g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is to go
Ionized water amounts to 1000g.
Embodiment 5:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon charcoal slurry for making 0.8-1.0g/L by oneself
150g, octadecyltrimethylammonium chloride 20g, polyacrylamide 10g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is to go
Ionized water amounts to 1000g.
Comparative example
One, preparation process
Pedotheque is weighed, artificially uniform contaminated soil sample, control soil pollution amount are with the methanol solution of nitrobenzene
Every gram of soil 10mg nitrobenzene is made contaminated soil sample to be used, is kept in dark place as the methanol solution to the greatest extent that volatilizees at dark wind.
It is pre-processed (soil is totally submerged in mixed solution) in 95% ethyl alcohol and the mixed solution of butyl glycol ether, it is quiet
It is filtering drying, to be used after setting 30min.
Quartz sand is completed in the bottom of the organic glass pillar of diameter about 3cm, contaminated samples 100g is weighed, is put into column,
Glass column is gently beaten, guarantees that soil dense distribution in Organic glass column, is then covered with one layer of quartz sand, uses various concentration
Single or compound surfactant solution elute from top to down, every 100ml collects one layer of efflux.It measures in solution
The content of nitrobenzene.
Comparative example 1:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon for making 0.8-1.0g/L by oneself
Charcoal starches 150g, lauryl sodium sulfate 30g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is deionized water, amounts to 1000g.
Comparative example 2:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon for making 0.8-1.0g/L by oneself
Charcoal starches 150g, dodecyl trimethyl ammonium bromide 30g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is deionized water, amounts to
1000g。
Comparative example 3:95% ethyl alcohol and butyl glycol ether mixed solution 250g, the active carbon for making 0.8-1.0g/L by oneself
Charcoal starches 150g, polyoxyethylene ether 30g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is deionized water, amounts to 1000g.
Comparative example 4:95% ethyl alcohol and butyl glycol ether mixed solution 250g, neopelex 12g polyoxy
Vinethene 18g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is deionized water, amounts to 1000g.
Comparative example 5:95% ethyl alcohol and butyl glycol ether mixed solution 250g, tetradecyltrimethylammonium bromide
18g, polyoxyethylene ether 12g, ethyl alcohol 100g, butyl glycol ether 100g, remaining is deionized water, amounts to 1000g.
Conclusion
Through the foregoing embodiment and the research of comparative example, specific visible Tables 1 and 2 is answered prepared by the present invention
Mould assembly processing agent solution is truly feasible in terms for the treatment of of Nitrobenzene contaminated soil enhanced remediation improvement, than single surfactant
Administering with compound surfactant solution treatment of Nitrobenzene contaminated soil enhanced remediation has more apparent advantage.By table
It can find the nitrobenzene accumulation elution amount highest in embodiment 2, the present invention is practical, is to a certain extent nitrobenzene soil
The enhanced remediation improvement of earth pollution provides strong theoretical research foundation, for compound surfactant solution processing soil
Earth nitrobenzene contamination also provides further reference, has stronger economic benefit and environmental benefit.
Table 1
| Embodiment | Nitrobenzene accumulates elution amount (mg) | Comparative example | Nitrobenzene accumulates elution amount (mg) |
| Embodiment 1 | 882.9 | Comparative example 1 | 803.9 |
| Embodiment 2 | 915.8 | Comparative example 2 | 802.3 |
| Embodiment 3 | 915.6 | Comparative example 3 | 823.4 |
| Embodiment 4 | 842.3 | Comparative example 4 | 899.2 |
| Embodiment 5 | 843.4 | Comparative example 5 | 900.5 |
Table 2
| Embodiment | Smell | Residual quantity | Enhanced remediation effect | Elution amount | Micella stability |
| Embodiment 1 | It is relatively light | It is low | It is good | It is good | Enhancing |
| Embodiment 2 | It is relatively light | It is lower | Preferably | Preferably | Enhancing |
| Embodiment 3 | It is relatively light | It is lower | Preferably | Preferably | Enhancing |
| Embodiment 4 | It is relatively light | Generally | Generally | Generally | Enhancing |
| Embodiment 5 | It is relatively light | Generally | Generally | Generally | Enhancing |
| Comparative example 1 | It is relatively light | Generally | Generally | Generally | Generally |
| Comparative example 2 | It is relatively light | Generally | Generally | Generally | Generally |
| Comparative example 3 | It is relatively light | Generally | Generally | Generally | Generally |
| Comparative example 4 | Gently | It is low | It is good | It is good | Enhancing |
| Comparative example 5 | Gently | It is low | It is good | It is good | Enhancing |
Claims (5)
1. a kind of enhanced remediation composite treating agent of soil nitrobenzene contamination, which is characterized in that include following component:
Active carbon charcoal slurry, the quaternary ammonium salts cationic of 95% ethyl alcohol and butyl glycol ether mixed solution, 0.8-1.0g/L
Activating agent, polyacrylamide, ethyl alcohol, butyl glycol ether and deionized water.
2. the enhanced remediation composite treating agent of soil nitrobenzene contamination according to claim 1, which is characterized in that described
Pretreatment fluid is the mixed solution of 95% ethyl alcohol and butyl glycol ether, wherein the ethyl alcohol that the ethyl alcohol is 95%.
3. the enhanced remediation composite treating agent of soil nitrobenzene contamination according to claim 1, which is characterized in that described
Quaternary ammonium salts cationic surface active agent is that cetyl trimethyl chlorine (bromine) changes ammonium, trimethyl chlorine (bromine) is changed
Ammonium, tetradecyltrimethylammonium chlorine (bromine) change ammonium, octadecyl trimethyl chlorine (bromine) changes one of ammonium or any several combinations.
4. the enhanced remediation composite treating agent of soil nitrobenzene contamination according to claim 1, which is characterized in that described
Active carbon charcoal slurry, the quaternary ammonium salts cationic surfactant of 90% ethyl alcohol and butyl glycol ether mixed solution, 0.8-1.0g/L
Agent, polyacrylamide, ethyl alcohol, butyl glycol ether and deionized water respectively Zhan always feed intake mass ratio 25%, 15%, 1.2%,
1.8%, 10%, 10%, remaining is deionized water, amounts to 100%.
5. the application method of the enhanced remediation composite treating agent of soil nitrobenzene contamination according to claim 1, feature
It is, includes the following steps:
1) soil is randomly choosed, plant undesirable root, stone etc., natural air drying are removed, the sieving of 80 mesh is kept in dark place；
2) the active carbon charcoal slurry for preparing 0.8-1.0g/L, prepares nitrobenzene contamination pedotheque；
3) the nitrobenzene contamination pedotheque of preparation is placed into 95% ethyl alcohol and the mixed solution of butyl glycol ether and is carried out
It pre-processes (soil is totally submerged in mixed solution), after standing 30min, it is to be used to be contaminated soil for filtering；
4) by active carbon charcoal slurry, quaternary ammonium salts cationic surface active agent, the polyacrylamide, ethyl alcohol, second of 0.8-1.0g/L
Glycol butyl ether and deionized water stir, and prepare composite treating agent；
5) finally composite treating agent elutes self-control nitrobenzene contamination soil, the soil repaired.
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Cited By (3)
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| CN111360053A (en) * | 2020-03-09 | 2020-07-03 | 上海应用技术大学 | Polluted soil oxidation remediation method |
| CN111804722A (en) * | 2020-07-09 | 2020-10-23 | 天津绿缘环保工程股份有限公司 | Aniline polluted soil leaching remediation method |
| JP7064048B1 (en) | 2020-11-27 | 2022-05-09 | 花王株式会社 | Liquid detergent composition for soil |
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